September 8, 2015 AT 4:00 pm

How to Make a Secret Knock Box #Arduino

This project demonstrates a design of a simple circuit and a box that can be unlocked using a specific knock. The circuit consists of an Arduino uno, a microphone, two LEDs, and a servo motor. The box can be made with your own design and creativity, but if you have access to a laser cutting machine, you can use the design uploaded in this instructable to make your box using acrylic. The video shows how the box responds to the secret knock.